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Monitoring system and monitoring method capable of carrying out full-time thermal runaway early warning on power battery

A power battery and monitoring system technology, applied in battery/fuel cell control devices, secondary batteries, secondary battery repair/maintenance, etc., can solve problems such as inability to monitor, achieve improved reliability, comprehensive monitoring data, and high reliability sexual effect

Active Publication Date: 2020-11-10
DONGFENG MOTOR CORP HUBEI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is an obvious problem in this type of method, that is, when the controller is in a dormant state, such as when the electric vehicle is parked and powered off, it cannot monitor the above parameters and give an early warning

Method used

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  • Monitoring system and monitoring method capable of carrying out full-time thermal runaway early warning on power battery
  • Monitoring system and monitoring method capable of carrying out full-time thermal runaway early warning on power battery
  • Monitoring system and monitoring method capable of carrying out full-time thermal runaway early warning on power battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] The trigger conditions of fault warning are shown in the table below:

[0066] serial number Combination of triggering thermal runaway fault warning conditions 1 Single cell voltage68℃(2s) 2 Cell voltage2℃ / 0.6s(2s) 3 Single cell voltage30℃(2s) 4 The highest temperature of the single unit > 68°C (2s) & the number of voltage sampling open circuit faults ≥ 1 5 Single voltage 6 Single body temperature difference > 30°C (2s) & voltage sampling open circuit failure number ≥ 1 7 The number of temperature sensor failures≥2 & the number of voltage sampling open circuit failures≥1 8 Communication failure & pressure exceeds threshold for a period of time 9 Communication failure & gas concentration exceeds the threshold for a period of time 10 Communication fails & pressure fluctuates for a while 11 Communication failure & gas concentration fluctuates for a while

[0067] The maximum temperature of 68°...

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Abstract

The invention relates to the technical field of vehicle thermal runaway monitoring, in particular to a monitoring system and monitoring method capable of carrying out full-time thermal runaway early warning on a power battery. The system comprises a detection unit, a wake-up circuit, a controller and an early warning unit. The wake-up circuit comprises an NAND gate circuit and a fusing circuit, wherein the input end of the NAND gate circuit is connected with the signal output end of a wake-up source and the signal output end of the fusing circuit, the fusing circuit is arranged on a flexible circuit board in an energy storage battery pack, and the input end of the fusing circuit is connected with the wake-up signal source. The fusing circuit arranged on the flexible circuit board in the energy storage battery pack is adopted to be matched with the NAND gate circuit to achieve awakening control over the controller; when the temperature in any battery pack is too high, the fusing circuitcan be fused, the wake-up signal output is achieved, and therefore the controller is waked up to conduct thermal runaway detection, control and early warning.

Description

technical field [0001] The invention relates to the technical field of vehicle thermal runaway monitoring, in particular to a monitoring system and monitoring method capable of full-time thermal runaway warning of a power battery. Background technique [0002] With the large-scale application of electric vehicles, electric vehicle fire incidents have attracted widespread attention. At present, most of the thermal runaway passive detection and early warning schemes use the controller to monitor the battery voltage, current, temperature, gas, pressure and other parameters in the battery pack, so as to determine whether a thermal runaway event has occurred and give an early warning. This requires the controller in working condition. There is an obvious problem in this type of method, that is, when the controller is in a dormant state, such as when the electric vehicle is parked and powered off, it cannot monitor the above parameters and give an early warning. Contents of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L3/00B60L58/10H01M10/42H01M10/48
CPCB60L3/0046B60L58/10H01M10/4207H01M10/425H01M10/482H01M10/486H01M10/488H01M2010/4278Y02T10/70Y02E60/10
Inventor 肖寒朱立宾刘爽周坤朱禹
Owner DONGFENG MOTOR CORP HUBEI
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